Pull module updates from Jessica Yu:
 "Summary of modules changes for the 4.15 merge window:

   - treewide module_param_call() cleanup, fix up set/get function
     prototype mismatches, from Kees Cook

   - minor code cleanups"

* tag 'modules-for-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  module: Do not paper over type mismatches in module_param_call()
  treewide: Fix function prototypes for module_param_call()
  module: Prepare to convert all module_param_call() prototypes
  kernel/module: Delete an error message for a failed memory allocation in add_module_usage()

Pull mailbox updates from Jassi Brar:
 "Change to POLL api and fixes for FlexRM and OMAP driver.

  Summary:

   - Core: Prefer ACK method over POLL, if both supported

   - Test: use flag instead of special character

   - FlexRM: Usual driver internal minor churn

   - Omap: fix error path"

* tag 'mailbox-v4.15' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  mailbox/omap: unregister mbox class
  mailbox: mailbox-test: don't rely on rx_buffer content to signal data ready
  mailbox: reset txdone_method TXDONE_BY_POLL if client knows_txdone
  mailbox: Build Broadcom FlexRM driver as loadable module for iProc SOCs
  mailbox: bcm-flexrm-mailbox: Use common GPL comment header
  mailbox: bcm-flexrm-mailbox: add depends on ARCH_BCM_IPROC
  mailbox: bcm-flexrm-mailbox: Print ring number in errors and warnings
  mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush sequence

Pull power supply and reset updates from Sebastian Reichel:

 - misc minor fixes

* tag 'for-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
  power: supply: cpcap-charger: fix incorrect return value check
  power: supply: replace pr_* with dev_*
  power: supply: pcf50633-charger: remove redundant variable charging_start
  power: supply: generic-adc-battery: remove redundant variable pdata
  power: supply: max8997: Improve a size determination in probe

Pull HSI updates from Sebastian Reichel:

 - add HSI OMAP4 bindings

 - misc small fixes

* tag 'hsi-for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-hsi:
  dt-bindings: hsi: add omap4 hsi controller bindings
  HSI: hsi_char: pr_err() strings should end with newlines
  HSI: omap_ssi_core: fix kilo to be "k" not "K"

Pull SELinux updates from Paul Moore:
 "Seven SELinux patches for v4.15, although five of the seven are small
  build fixes and cleanups.

  Of the remaining two patches, the only one worth really calling out is
  Eric's fix for the SELinux filesystem xattr set/remove code; the other
  patch simply converts the SELinux hash table implementation to use
  kmem_cache.

  Eric's setxattr/removexattr tweak converts SELinux back to calling the
  commoncap implementations when the xattr is not SELinux related. The
  immediate win is to fixup filesystem capabilities in user namespaces,
  but it makes things a bit saner overall; more information in the
  commit description"

* tag 'selinux-pr-20171113' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: remove extraneous initialization of slots_used and max_chain_len
  selinux: remove redundant assignment to len
  selinux: remove redundant assignment to str
  selinux: fix build warning
  selinux: fix build warning by removing the unused sid variable
  selinux: Perform both commoncap and selinux xattr checks
  selinux: Use kmem_cache for hashtab_node

Pull audit updates from Paul Moore:
 "Another relatively small pull request for audit, nine patches total.

  The only real new bit of functionality is the patch from Richard which
  adds the ability to filter records based on the filesystem type.

  The remainder are bug fixes and cleanups; the bug fix highlights
  include:

   - ensuring that we properly audit init/PID-1 (me)

   - allowing the audit daemon to shutdown the kernel/auditd connection
     cleanly by setting the audit PID to zero (Steve)"

* tag 'audit-pr-20171113' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: filter PATH records keyed on filesystem magic
  Audit: remove unused audit_log_secctx function
  audit: Allow auditd to set pid to 0 to end auditing
  audit: Add new syscalls to the perm=w filter
  audit: use audit_set_enabled() in audit_enable()
  audit: convert audit_ever_enabled to a boolean
  audit: don't use simple_strtol() anymore
  audit: initialize the audit subsystem as early as possible
  audit: ensure that 'audit=1' actually enables audit for PID 1

This matters at least for the mincore syscall, which will otherwise copy
uninitialized memory from the page allocator to userspace.  It is
probably also a correctness error for /proc/$pid/pagemap, but I haven't
tested that.

Removing the `walk->hugetlb_entry` condition in walk_hugetlb_range() has
no effect because the caller already checks for that.

This only reports holes in hugetlb ranges to callers who have specified
a hugetlb_entry callback.

This issue was found using an AFL-based fuzzer.

v2:
 - don't crash on ->pte_hole==NULL (Andrew Morton)
 - add Cc stable (Andrew Morton)

Fixes: 1e25a271 ("mincore: apply page table walker on do_mincore()")
Signed-off-by: Jann Horn <jannh@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull networking updates from David Miller:
 "Highlights:

   1) Maintain the TCP retransmit queue using an rbtree, with 1GB
      windows at 100Gb this really has become necessary. From Eric
      Dumazet.

   2) Multi-program support for cgroup+bpf, from Alexei Starovoitov.

   3) Perform broadcast flooding in hardware in mv88e6xxx, from Andrew
      Lunn.

   4) Add meter action support to openvswitch, from Andy Zhou.

   5) Add a data meta pointer for BPF accessible packets, from Daniel
      Borkmann.

   6) Namespace-ify almost all TCP sysctl knobs, from Eric Dumazet.

   7) Turn on Broadcom Tags in b53 driver, from Florian Fainelli.

   8) More work to move the RTNL mutex down, from Florian Westphal.

   9) Add 'bpftool' utility, to help with bpf program introspection.
      From Jakub Kicinski.

  10) Add new 'cpumap' type for XDP_REDIRECT action, from Jesper
      Dangaard Brouer.

  11) Support 'blocks' of transformations in the packet scheduler which
      can span multiple network devices, from Jiri Pirko.

  12) TC flower offload support in cxgb4, from Kumar Sanghvi.

  13) Priority based stream scheduler for SCTP, from Marcelo Ricardo
      Leitner.

  14) Thunderbolt networking driver, from Amir Levy and Mika Westerberg.

  15) Add RED qdisc offloadability, and use it in mlxsw driver. From
      Nogah Frankel.

  16) eBPF based device controller for cgroup v2, from Roman Gushchin.

  17) Add some fundamental tracepoints for TCP, from Song Liu.

  18) Remove garbage collection from ipv6 route layer, this is a
      significant accomplishment. From Wei Wang.

  19) Add multicast route offload support to mlxsw, from Yotam Gigi"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2177 commits)
  tcp: highest_sack fix
  geneve: fix fill_info when link down
  bpf: fix lockdep splat
  net: cdc_ncm: GetNtbFormat endian fix
  openvswitch: meter: fix NULL pointer dereference in ovs_meter_cmd_reply_start
  netem: remove unnecessary 64 bit modulus
  netem: use 64 bit divide by rate
  tcp: Namespace-ify sysctl_tcp_default_congestion_control
  net: Protect iterations over net::fib_notifier_ops in fib_seq_sum()
  ipv6: set all.accept_dad to 0 by default
  uapi: fix linux/tls.h userspace compilation error
  usbnet: ipheth: prevent TX queue timeouts when device not ready
  vhost_net: conditionally enable tx polling
  uapi: fix linux/rxrpc.h userspace compilation errors
  net: stmmac: fix LPI transitioning for dwmac4
  atm: horizon: Fix irq release error
  net-sysfs: trigger netlink notification on ifalias change via sysfs
  openvswitch: Using kfree_rcu() to simplify the code
  openvswitch: Make local function ovs_nsh_key_attr_size() static
  openvswitch: Fix return value check in ovs_meter_cmd_features()
  ...

Pull MIPS updates from James Hogan:
 "These are the main MIPS changes for 4.15.

  Fixes:
   - ralink: Fix MT7620 PCI build issues (4.5)
   - Disable cmpxchg64() and HAVE_VIRT_CPU_ACCOUNTING_GEN for 32-bit SMP
     (4.1)
   - Fix MIPS64 FP save/restore on 32-bit kernels (4.0)
   - ptrace: Pick up ptrace/seccomp changed syscall numbers (3.19)
   - ralink: Fix MT7628 pinmux (3.19)
   - BCM47XX: Fix LED inversion on WRT54GSv1 (3.17)
   - Fix n32 core dumping as o32 since regset support (3.13)
   - ralink: Drop obsolete USB_ARCH_HAS_HCD select

  Build system:
   - Default to "generic" (multiplatform) system type instead of IP22
   - Use generic little endian MIPS32 r2 configuration as default
     defconfig instead of ip22_defconfig

  FPU emulation:
   - Fix exception generation for certain R6 FPU instructions

  SMP:
   - Allow __cpu_number_map to be larger than NR_CPUS for sparse CPU id
     spaces

  Miscellaneous:
   - Add iomem resource for kernel bss section for kexec/kdump
   - Atomics: Nudge writes on bit unlock
   - DT files: Standardise "ok" -> "okay"

  Minor cleanups:
   - Define virt_to_pfn()
   - Make thread_saved_pc static
   - Simplify 32-bit sign extension in __read_64bit_c0_split()
   - DMA: Use vma_pages() helper
   - FPU emulation: Replace unsigned with unsigned int
   - MM: Removed unused lastpfn
   - Alchemy: Make clk_ops const
   - Lasat: Use setup_timer() helper
   - ralink: Use BIT() in MT7620 PCI driver

  Platform support:

  BMIPS:
  - Enable HARDIRQS_SW_RESEND

  Broadcom BCM63XX:
  - Add clkdev lookup support
  - Update clk driver, UART driver, DTs to handle named refclk from DTs
  - Split apart various clocks to more closely match hardware
  - Add ethernet clocks

  Cavium Octeon:
  - Remove usage of cvmx_wait() in favour of __delay()

  ImgTec Pistachio:
  - DT: Drop deprecated dwmmc num-slots property

  Ingenic JZ4780:
  - Add NFS root to Ci20 defconfig
  - Add watchdog to Ci20 DT & defconfig, and allow building of watchdog
    driver with this SoC

  Generic (multiplatform):
  - Migrate xilfpga (MIPSfpga) platform to the generic platform

  Lantiq xway:
  - Fix ASC0/ASC1 clocks"

* tag 'mips_4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: (46 commits)
  MIPS: Add iomem resource for kernel bss section.
  MIPS: cmpxchg64() and HAVE_VIRT_CPU_ACCOUNTING_GEN don't work for 32-bit SMP
  MIPS: BMIPS: Enable HARDIRQS_SW_RESEND
  MIPS: pci: Make use of the BIT() macro inside the mt7620 driver
  MIPS: pci: Remove KERN_WARN instance inside the mt7620 driver
  MIPS: pci: Remove duplicate define in mt7620 driver
  MIPS: ralink: Fix typo in mt7628 pinmux function
  MIPS: ralink: Fix MT7628 pinmux
  MIPS: Fix odd fp register warnings with MIPS64r2
  watchdog: jz4780: Allow selection of jz4740-wdt driver
  MIPS/ptrace: Update syscall nr on register changes
  MIPS/ptrace: Pick up ptrace/seccomp changed syscalls
  MIPS: Fix an n32 core file generation regset support regression
  MIPS: Fix MIPS64 FP save/restore on 32-bit kernels
  MIPS: page.h: Define virt_to_pfn()
  MIPS: Xilfpga: Switch to using generic defconfigs
  MIPS: generic: Add support for MIPSfpga
  MIPS: Set defconfig target to a generic system for 32r2el
  MIPS: Kconfig: Set default MIPS system type as generic
  MIPS: DTS: Remove num-slots from Pistachio SoC
  ...

Pull arm64 updates from Will Deacon:
 "The big highlight is support for the Scalable Vector Extension (SVE)
  which required extensive ABI work to ensure we don't break existing
  applications by blowing away their signal stack with the rather large
  new vector context (<= 2 kbit per vector register). There's further
  work to be done optimising things like exception return, but the ABI
  is solid now.

  Much of the line count comes from some new PMU drivers we have, but
  they're pretty self-contained and I suspect we'll have more of them in
  future.

  Plenty of acronym soup here:

   - initial support for the Scalable Vector Extension (SVE)

   - improved handling for SError interrupts (required to handle RAS
     events)

   - enable GCC support for 128-bit integer types

   - remove kernel text addresses from backtraces and register dumps

   - use of WFE to implement long delay()s

   - ACPI IORT updates from Lorenzo Pieralisi

   - perf PMU driver for the Statistical Profiling Extension (SPE)

   - perf PMU driver for Hisilicon's system PMUs

   - misc cleanups and non-critical fixes"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (97 commits)
  arm64: Make ARMV8_DEPRECATED depend on SYSCTL
  arm64: Implement __lshrti3 library function
  arm64: support __int128 on gcc 5+
  arm64/sve: Add documentation
  arm64/sve: Detect SVE and activate runtime support
  arm64/sve: KVM: Hide SVE from CPU features exposed to guests
  arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
  arm64/sve: KVM: Prevent guests from using SVE
  arm64/sve: Add sysctl to set the default vector length for new processes
  arm64/sve: Add prctl controls for userspace vector length management
  arm64/sve: ptrace and ELF coredump support
  arm64/sve: Preserve SVE registers around EFI runtime service calls
  arm64/sve: Preserve SVE registers around kernel-mode NEON use
  arm64/sve: Probe SVE capabilities and usable vector lengths
  arm64: cpufeature: Move sys_caps_initialised declarations
  arm64/sve: Backend logic for setting the vector length
  arm64/sve: Signal handling support
  arm64/sve: Support vector length resetting for new processes
  arm64/sve: Core task context handling
  arm64/sve: Low-level CPU setup
  ...

Merge tag 'riscv-for-linus-4.15-arch-v9-premerge' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux

Pull RISC-V architecture support from Palmer Dabbelt:
 "This contains the core RISC-V Linux port, which has been through nine
  rounds of review on various mailing lists. The port is not complete:
  there's some cleanup patches moving through the review process, a
  whole bunch of drivers that need some work, and a lot of feature
  additions that will be needed.

  The patches contained in this tag have been through nine rounds of
  review on the various mailing lists. I have some outstanding cleanup
  patches, but since there's been so much review on these patches I
  thought it would be best to submit them as-is and then submit explicit
  cleanup patches so everyone can review them. This first patch set is
  big enough that it's a bit of a pain to constantly rewrite, and it's
  caused a few headaches with various contributors.

  The port is definately a work in progress. While what's there builds
  and boots with 4.14, it's a bit hard to actually see anything happen
  because there are no device drivers yet. I maintain a staging branch
  that contains all the device drivers and cleanup that actually works,
  but those patches won't all be ready for a while. I'd like to get what
  we currently have into your tree so everyone can start working from a
  single base -- of particular importance is allowing the glibc
  upstreaming process to proceed so we can sort out any possibly
  lingering user-visible ABI problems we might have.

  Copied below is the ChangeLog that contains the history of this patch
  set:

   (v9) As per suggestions on our v8 patch set, I've split the core
        architecture code out from our drivers and would like to submit
        this patch set to be included into linux-next, with the goal
        being to be merged in during the next merge window. This patch
        set is based on 4.14-rc2, but if it's better to have it based on
        something else then I can change it around.

        This patch set contains just the core arch code for RISC-V, so
        while it builds an nominally boots, you can't print or take an
        interrupt so it's not that useful. If you're looking to actually
        boot a system it would probably be better to use the full patch
        set listed below.

        We've collected a handful of tags from reviewers, and the
        remainder of the patch set only got minimal feedback last time.
        Here's what changed:

         - We now use the device tree to initialize the timer driver so
           it's less tighly coupled with the arch port.

         - I cleaned up the defconfigs -- there's actually now just one,
           and it's empty. For now I think we're OK with what the kernel
           sets as defaults, but I anticipate we'll begin to expand this
           as people start to use the port more.

         - The VDSO symbols version is sane.

         - We WFI while spinning in the boot loop.

         - A handful of comments have been added.

        While there are still a handful of FIXMEs in this patch set,
        we've started to get enough interest from various users and
        contributors that maintaining an out of tree patch set is
        starting to become a big burden. Hopefully the patches are good
        enough to merge now, which will at least get everyone working in
        a more reasonable manner as we clean up the remaining issues.

   (v8) I know it may not be the ideal time to submit a patch set right
        now, as it's the middle of the merge window, but things have
        calmed down quite a bit in the last month so I thought it would
        be good to get everyone on the same page. There's been a handful
        of changes since the last patch set, but most of them are fairly
        minor:

         - We changed PAGE_OFFSET to allowing mapping more physical
           memory on 64-bit systems. This is user configurable, as it
           triggers a different code model that generates slightly less
           efficient code.

         - The device tree binding documentation is back, I'd managed to
           lose it at some point.

         - We now pass the atomic64 test suite

         - The SBI timer driver has been refactored.

   (v7) It's been a while since my last patch set, but the changes han
        been fairly minimal:

         - The PCI cleanup patches have been dropped, we'll do them as a
           separate patch set later.

         - We've the Kconfig entries from CONFIG_ISA_* to
           CONFIG_RISCV_ISA_*, to make grep easier.

         - There have been a handful of memory model related tweaks in
           I/O land, particularly relating the PCI and the upcoming
           platform specification. There are significant comments in the
           relevant files. This is still a WIP, but I think we're close
           to getting as good as we're going to get until we end up with
           some more specifications.

   (v6) As it's been only a day since the v5 patch set, the changes are
        pretty minimal:

         - The patch set is now based on linux-next/master, which I
           believe is a better base now that we're getting closer to
           upstream.

         - EARLY_PRINTK is no longer an option. Since the SBI console is
           reasonable, there's no penalty to enabling it (and thus no
           benefit to disabling it).

         - The mmap syscalls were refactored a bit.

   (v5) Things have really started to calm down, so this is fairly
        similar to the v4 patch set. The most interesting changes
        include:

         - We've moved back to a single patch set.

         - SMP support has been fixed, I was accidentally running on a
           non-SMP configuration. There were various mistakes all over
           the tree as a result of this.

         - The cmpxchg syscalls have been removed, as they were deemed a
           bad idea. As a result, RISC-V Linux systems mandate the A
           extension. The corresponding Kconfig entry to enable builds
           on non-A systems has been removed.

         - A few more atomic fixes: mostly fence changes, but those
           resulted in a handful of additional macros that were no
           longer necessary.

         - riscv_early_sie has been removed.

   (v4) There have only been a few changes since the v3 patch set:

         - The cmpxchg64 syscall is no longer enabled on 32-bit systems.
           It's not possible to provide this on SMP systems, and it's
           not necessary as glibc knows not to call it.

         - We provide a ELF_HWCAP so users can determine the ISA of the
           machine the kernel is running on.

         - The multi-line comments are in a better form.

         - There were a handful of headers that could be replaced with
           the asm-generic versions, and a few unnecessary definitions.

         - We no longer use printk, but instead use pr_*.

         - A few Kconfig and defconfig entries have been cleaned up.

   (v3) A highlight of the changes since the v2 patch set includes:

         - We've split out all our drivers into separate patch sets,
           which I've already sent out to the relevant maintainers. I
           haven't included those patches in this patch set, but some of
           them are necessary to build our port.

         - The patch set is now split up differently: rather than being
           split per directory it is split per topic. Hopefully this
           will make it easier to review the port on the mailing list.
           The split is a bit rough, so you probably still want to look
           at the patch set as a whole.

         - atomic.h has been completely rewritten and is hopefully now
           correct. I've attempted to sanitize the various other memory
           model related code as well, and I think it should all be sane
           now aside from a handful of FIXMEs commented in the code.

         - We've changed the cmpexchg syscall to always exist and to not
           be multiplexed. There is also a VDSO entry for compare and
           exchange, which allows kernels with the A extension to
           execute user code without the A extension reasonably fast.

         - Our user-visible register state now contains enough space for
           the Q extension for 128-bit floating point, as well as a few
           words to allow extensibility to future ISA extensions like
           the eventual V extension for vectors.

         - A handful of driver cleanups, but these have been split into
           separate patch sets now so I won't duplicate them here.

   (v2) A highlight of the changes since the v1 patch set includes:

         - We've split out our drivers into the right places, which
           means now there's a lot more patches. I'll be submitting
           these patches to various subsystem maintainers and including
           them in any future RISC-V patch sets until they've been
           merged.

         - The SBI console driver has been completely rewritten to use
           the HVC helpers and is now significantly smaller.

         - We've begun to use weaker barriers as opposed to just the big
           "fence". There's still some work to do here, specifically:
            - We need fences in the relaxed MMIO functions.
            - The non-relaxed MMIO functions are missing R/W bits on their fences.
            - Many AMOs need the aq and rl bits set.

         - We now have thread_info in task_struct. As a result, sscratch
           now contains TP instead of SP. This was necessary because
           thread_info is no longer on the stack.

         - A few shared routines have been added that we use instead of
           creating another arch copy"
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

* tag 'riscv-for-linus-4.15-arch-v9-premerge' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux:
  RISC-V: Build Infrastructure
  RISC-V: User-facing API
  RISC-V: Paging and MMU
  RISC-V: Device, timer, IRQs, and the SBI
  RISC-V: Task implementation
  RISC-V: ELF and module implementation
  RISC-V: Generic library routines and assembly
  RISC-V: Atomic and Locking Code
  RISC-V: Init and Halt Code
  dt-bindings: RISC-V CPU Bindings
  lib: Add shared copies of some GCC library routines
  MAINTAINERS: Add RISC-V

Pull livepatching updates from Jiri Kosina:

 - shadow variables support, allowing livepatches to associate new
   "shadow" fields to existing data structures, from Joe Lawrence

 - pre/post patch callbacks API, allowing livepatch writers to register
   callbacks to be called before and after patch application, from Joe
   Lawrence

* 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: __klp_disable_patch() should never be called for disabled patches
  livepatch: Correctly call klp_post_unpatch_callback() in error paths
  livepatch: add transition notices
  livepatch: move transition "complete" notice into klp_complete_transition()
  livepatch: add (un)patch callbacks
  livepatch: Small shadow variable documentation fixes
  livepatch: __klp_shadow_get_or_alloc() is local to shadow.c
  livepatch: introduce shadow variable API

Pull trivial tree updates from Jiri Kosina:
 "The usual rocket-science from trivial tree for 4.15"

* 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  MAINTAINERS: relinquish kconfig
  MAINTAINERS: Update my email address
  treewide: Fix typos in Kconfig
  kfifo: Fix comments
  init/Kconfig: Fix module signing document location
  misc: ibmasm: Return error on error path
  HID: logitech-hidpp: fix mistake in printk, "feeback" -> "feedback"
  MAINTAINERS: Correct path to uDraw PS3 driver
  tracing: Fix doc mistakes in trace sample
  tracing: Kconfig text fixes for CONFIG_HWLAT_TRACER
  MIPS: Alchemy: Remove reverted CONFIG_NETLINK_MMAP from db1xxx_defconfig
  mm/huge_memory.c: fixup grammar in comment
  lib/xz: Add fall-through comments to a switch statement

Pull HID updates from Jiri Kosina:

 - high resolution mode for Dell canvas support, from Benjamin Tissoires

 - pen handling fixes for the Wacom driver, from Jason Gerecke

 - i2c-hid: Apollo-Lake based laptops improvements, from Hans de Goede

 - Input/Core: eraser tool support, from Ping Cheng

 - new ALPS touchpad (T4, found currently on HP EliteBook 1000, Zbook
   Stduio and HP Elite book x360) supportm from Masaki Ota

 - other smaller assorted fixes

* 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (33 commits)
  HID: cp2112: fix broken gpio_direction_input callback
  HID: cp2112: fix interface specification URL
  HID: Wacom: switch Dell canvas into highres mode
  HID: wacom: generic: Send BTN_STYLUS3 when both barrel switches are set
  HID: sony: Fix SHANWAN pad rumbling on USB
  HID: i2c-hid: Add no-irq-after-reset quirk for 0911:5288 device
  HID: add backlight level quirk for Asus ROG laptops
  HID: cp2112: add HIDRAW dependency
  HID: Add ID 044f:b605 ThrustMaster, Inc. force feedback Racing Wheel
  HID: hid-logitech: remove redundant assignment to pointer value
  HID: wacom: generic: Recognize WACOM_HID_WD_PEN as a type of pen collection
  HID: rmi: Check that a device is a RMI device before calling RMI functions
  HID: add multi-input quirk for GamepadBlock
  HID: alps: add new U1 device ID
  HID: alps: add support for Alps T4 Touchpad device
  HID: alps: remove variables local to u1_init() from the device struct
  HID: alps: properly handle max_fingers and minimum on X and Y axis
  HID: alps: Separate U1 device code
  HID: alps: delete unnecessary struct u1_dev devInfo
  HID: usbhid: Convert timers to use timer_setup()
  ...

syzbot easily found a regression added in our latest patches [1]

No longer set tp->highest_sack to the head of the send queue since
this is not logical and error prone.

Only sack processing should maintain the pointer to an skb from rtx queue.

We might in the future only remember the sequence instead of a pointer to skb,
since rb-tree should allow a fast lookup.

[1]
BUG: KASAN: use-after-free in tcp_highest_sack_seq include/net/tcp.h:1706 [inline]
BUG: KASAN: use-after-free in tcp_ack+0x42bb/0x4fd0 net/ipv4/tcp_input.c:3537
Read of size 4 at addr ffff8801c154faa8 by task syz-executor4/12860

CPU: 0 PID: 12860 Comm: syz-executor4 Not tainted 4.14.0-next-20171113+ #41
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
 tcp_highest_sack_seq include/net/tcp.h:1706 [inline]
 tcp_ack+0x42bb/0x4fd0 net/ipv4/tcp_input.c:3537
 tcp_rcv_established+0x672/0x18a0 net/ipv4/tcp_input.c:5439
 tcp_v4_do_rcv+0x2ab/0x7d0 net/ipv4/tcp_ipv4.c:1468
 sk_backlog_rcv include/net/sock.h:909 [inline]
 __release_sock+0x124/0x360 net/core/sock.c:2264
 release_sock+0xa4/0x2a0 net/core/sock.c:2778
 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1462
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2048
 __sys_sendmsg+0xe5/0x210 net/socket.c:2082
 SYSC_sendmsg net/socket.c:2093 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2089
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452879
RSP: 002b:00007fc9761bfbe8 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879
RDX: 0000000000000000 RSI: 0000000020917fc8 RDI: 0000000000000015
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee3a0
R13: 00000000ffffffff R14: 00007fc9761c06d4 R15: 0000000000000000

Allocated by task 12860:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 kmem_cache_alloc_node+0x144/0x760 mm/slab.c:3638
 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193
 alloc_skb_fclone include/linux/skbuff.h:1023 [inline]
 sk_stream_alloc_skb+0x11d/0x900 net/ipv4/tcp.c:870
 tcp_sendmsg_locked+0x1341/0x3b80 net/ipv4/tcp.c:1299
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1461
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 SYSC_sendto+0x358/0x5a0 net/socket.c:1749
 SyS_sendto+0x40/0x50 net/socket.c:1717
 entry_SYSCALL_64_fastpath+0x1f/0x96

Freed by task 12860:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3492 [inline]
 kmem_cache_free+0x77/0x280 mm/slab.c:3750
 kfree_skbmem+0xdd/0x1d0 net/core/skbuff.c:603
 __kfree_skb+0x1d/0x20 net/core/skbuff.c:642
 sk_wmem_free_skb include/net/sock.h:1419 [inline]
 tcp_rtx_queue_unlink_and_free include/net/tcp.h:1682 [inline]
 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3111 [inline]
 tcp_ack+0x1b17/0x4fd0 net/ipv4/tcp_input.c:3593
 tcp_rcv_established+0x672/0x18a0 net/ipv4/tcp_input.c:5439
 tcp_v4_do_rcv+0x2ab/0x7d0 net/ipv4/tcp_ipv4.c:1468
 sk_backlog_rcv include/net/sock.h:909 [inline]
 __release_sock+0x124/0x360 net/core/sock.c:2264
 release_sock+0xa4/0x2a0 net/core/sock.c:2778
 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1462
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2048
 __sys_sendmsg+0xe5/0x210 net/socket.c:2082
 SYSC_sendmsg net/socket.c:2093 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2089
 entry_SYSCALL_64_fastpath+0x1f/0x96

The buggy address belongs to the object at ffff8801c154fa80
 which belongs to the cache skbuff_fclone_cache of size 456
The buggy address is located 40 bytes inside of
 456-byte region [ffff8801c154fa80, ffff8801c154fc48)
The buggy address belongs to the page:
page:ffffea00070553c0 count:1 mapcount:0 mapping:ffff8801c154f080 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801c154f080 0000000000000000 0000000100000006
raw: ffffea00070a5a20 ffffea0006a18360 ffff8801d9ca0500 0000000000000000
page dumped because: kasan: bad access detected

Fixes: 737ff314 ("tcp: use sequence distance to detect reordering")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

geneve->sock4/6 were added with geneve_open and released with geneve_stop.
So when geneve link down, we will not able to show remote address and
checksum info after commit 11387fe4 ("geneve: fix fill_info when using
collect_metadata").

Fix this by avoid passing *_REMOTE{,6} for COLLECT_METADATA since they are
mutually exclusive, and always show UDP_ZERO_CSUM6_RX info.

Fixes: 11387fe4 ("geneve: fix fill_info when using collect_metadata")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

pcpu_freelist_pop() needs the same lockdep awareness than
pcpu_freelist_populate() to avoid a false positive.

 [ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ]

 switchto-defaul/12508 [HC0[0]:SC0[6]:HE0:SE0] is trying to acquire:
  (&htab->buckets[i].lock){......}, at: [<ffffffff9dc099cb>] __htab_percpu_map_update_elem+0x1cb/0x300

 and this task is already holding:
  (dev_queue->dev->qdisc_class ?: &qdisc_tx_lock#2){+.-...}, at: [<ffffffff9e135848>] __dev_queue_xmit+0
x868/0x1240
 which would create a new lock dependency:
  (dev_queue->dev->qdisc_class ?: &qdisc_tx_lock#2){+.-...} -> (&htab->buckets[i].lock){......}

 but this new dependency connects a SOFTIRQ-irq-safe lock:
  (dev_queue->dev->qdisc_class ?: &qdisc_tx_lock#2){+.-...}
 ... which became SOFTIRQ-irq-safe at:
   [<ffffffff9db5931b>] __lock_acquire+0x42b/0x1f10
   [<ffffffff9db5b32c>] lock_acquire+0xbc/0x1b0
   [<ffffffff9da05e38>] _raw_spin_lock+0x38/0x50
   [<ffffffff9e135848>] __dev_queue_xmit+0x868/0x1240
   [<ffffffff9e136240>] dev_queue_xmit+0x10/0x20
   [<ffffffff9e1965d9>] ip_finish_output2+0x439/0x590
   [<ffffffff9e197410>] ip_finish_output+0x150/0x2f0
   [<ffffffff9e19886d>] ip_output+0x7d/0x260
   [<ffffffff9e19789e>] ip_local_out+0x5e/0xe0
   [<ffffffff9e197b25>] ip_queue_xmit+0x205/0x620
   [<ffffffff9e1b8398>] tcp_transmit_skb+0x5a8/0xcb0
   [<ffffffff9e1ba152>] tcp_write_xmit+0x242/0x1070
   [<ffffffff9e1baffc>] __tcp_push_pending_frames+0x3c/0xf0
   [<ffffffff9e1b3472>] tcp_rcv_established+0x312/0x700
   [<ffffffff9e1c1acc>] tcp_v4_do_rcv+0x11c/0x200
   [<ffffffff9e1c3dc2>] tcp_v4_rcv+0xaa2/0xc30
   [<ffffffff9e191107>] ip_local_deliver_finish+0xa7/0x240
   [<ffffffff9e191a36>] ip_local_deliver+0x66/0x200
   [<ffffffff9e19137d>] ip_rcv_finish+0xdd/0x560
   [<ffffffff9e191e65>] ip_rcv+0x295/0x510
   [<ffffffff9e12ff88>] __netif_receive_skb_core+0x988/0x1020
   [<ffffffff9e130641>] __netif_receive_skb+0x21/0x70
   [<ffffffff9e1306ff>] process_backlog+0x6f/0x230
   [<ffffffff9e132129>] net_rx_action+0x229/0x420
   [<ffffffff9da07ee8>] __do_softirq+0xd8/0x43d
   [<ffffffff9e282bcc>] do_softirq_own_stack+0x1c/0x30
   [<ffffffff9dafc2f5>] do_softirq+0x55/0x60
   [<ffffffff9dafc3a8>] __local_bh_enable_ip+0xa8/0xb0
   [<ffffffff9db4c727>] cpu_startup_entry+0x1c7/0x500
   [<ffffffff9daab333>] start_secondary+0x113/0x140

 to a SOFTIRQ-irq-unsafe lock:
  (&head->lock){+.+...}
 ... which became SOFTIRQ-irq-unsafe at:
 ...  [<ffffffff9db5971f>] __lock_acquire+0x82f/0x1f10
   [<ffffffff9db5b32c>] lock_acquire+0xbc/0x1b0
   [<ffffffff9da05e38>] _raw_spin_lock+0x38/0x50
   [<ffffffff9dc0b7fa>] pcpu_freelist_pop+0x7a/0xb0
   [<ffffffff9dc08b2c>] htab_map_alloc+0x50c/0x5f0
   [<ffffffff9dc00dc5>] SyS_bpf+0x265/0x1200
   [<ffffffff9e28195f>] entry_SYSCALL_64_fastpath+0x12/0x17

 other info that might help us debug this:

 Chain exists of:
   dev_queue->dev->qdisc_class ?: &qdisc_tx_lock#2 --> &htab->buckets[i].lock --> &head->lock

  Possible interrupt unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   lock(&head->lock);
                                local_irq_disable();
                                lock(dev_queue->dev->qdisc_class ?: &qdisc_tx_lock#2);
                                lock(&htab->buckets[i].lock);
   <Interrupt>
     lock(dev_queue->dev->qdisc_class ?: &qdisc_tx_lock#2);

  *** DEADLOCK ***

Fixes: e19494ed ("bpf: introduce percpu_freelist")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The GetNtbFormat and SetNtbFormat requests operate on 16 bit little
endian values. We get away with ignoring this most of the time, because
we only care about USB_CDC_NCM_NTB16_FORMAT which is 0x0000.  This
fails for USB_CDC_NCM_NTB32_FORMAT.

Fix comparison between LE value from device and constant by converting
the constant to LE.
Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Fixes: 2b02c20c ("cdc_ncm: Set NTB format again after altsetting switch for Huawei devices")
Cc: Enrico Mioso <mrkiko.rs@gmail.com>
Cc: Christian Panton <christian@panton.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Acked-By: Enrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

- High resolution mode for DEll canvas support, from Benjamin Tissoires
- A lot of improvements to pen handling in the Wacom driver, from Jason Gerecke
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

- usbhid: conversion to timer_setup() and from_timer() from Kees Cook
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

- cp2112: GPIO error handling and Kconfig fixes from Sébastien Szymanski
- i2c-hid: fixup / quirk for Apollo-Lake based laptops, from Hans de Goede
- Input/Core: add eraser tool support, from Ping Cheng
- small assorted code fixes
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

- SHANWAN PS3 rumble fix from Bastien Nocera
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

- make sure that we forward MSC_TIMESTAMP in accordance to the specification,
  from Nicolas Boichat
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

- small code fixes for Logitech driver from Colin Ian King

- trivial printk() line termination fix for HyperV

- Asus laptop fixes (fn keys, backlight), from Mustafa Kuscu and
  Maxime Bellengé

- New ALPS touchpad (T4, found currently on HP EliteBook 1000, Zbook Stduio
  and HP Elite book x360) support from Masaki Ota

- Wacom: recognize PEN application collection properly, from Jason Gerecke
- RMI: avoid cofusion caused by RMI functions being by mistake called on
  non-RMI devices, from Andrew Duggan
- small device-ID-specific quirks/fixes
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

This pulls in an infrastructure/API that allows livepatch writers to
register pre-patch and post-patch callbacks that allow for running a
glue code necessary for finalizing the patching if necessary.

Conflicts:
	kernel/livepatch/core.c
	- trivial conflict by adding a callback call into
	  module going notifier vs. moving that code block
	  to klp_cleanup_module_patches_limited()
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Shadow variables allow callers to associate new shadow fields to existing data
structures.  This is intended to be used by livepatch modules seeking to
emulate additions to data structure definitions.

It seems that the intention of the code is to null check the value
returned by function genlmsg_put. But the current code is null
checking the address of the pointer that holds the value returned
by genlmsg_put.

Fix this by properly null checking the value returned by function
genlmsg_put in order to avoid a pontential null pointer dereference.

Addresses-Coverity-ID: 1461561 ("Dereference before null check")
Addresses-Coverity-ID: 1461562 ("Dereference null return value")
Fixes: 96fbc13d ("openvswitch: Add meter infrastructure")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Stephen Hemminger says:

====================
netem: fix compilation on 32 bit

A couple of places where 64 bit CPU was being assumed incorrectly.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix compilation on 32 bit platforms (where doing modulus operation
with 64 bit requires extra glibc functions) by truncation.
The jitter for table distribution is limited to a 32 bit value
because random numbers are scaled as 32 bit value.

Also fix some whitespace.

Fixes: 99803171 ("netem: add uapi to express delay and jitter in nanoseconds")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since times are now expressed in nanosecond, need to now do
true 64 bit divide. Old code would truncate rate at 32 bits.
Rename function to better express current usage.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Make default TCP default congestion control to a per namespace
value. This changes default congestion control to a pointer to congestion ops
(rather than implicit as first element of available lsit).

The congestion control setting of new namespaces is inherited
from the current setting of the root namespace.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is at least unlocked deletion of net->ipv4.fib_notifier_ops
from net::fib_notifier_ops:

ip_fib_net_exit()
  rtnl_unlock()
  fib4_notifier_exit()
    fib_notifier_ops_unregister(net->ipv4.notifier_ops)
      list_del_rcu(&ops->list)

So fib_seq_sum() can't use rtnl_lock() only for protection.

The possible solution could be to use rtnl_lock()
in fib_notifier_ops_unregister(), but this adds
a possible delay during net namespace creation,
so we better use rcu_read_lock() till someone
really needs the mutex (if that happens).
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

With commits 35e015e1 and a2d3f3e3, the global 'accept_dad' flag
is also taken into account (default value is 1). If either global or
per-interface flag is non-zero, DAD will be enabled on a given interface.

This is not backward compatible: before those patches, the user could
disable DAD just by setting the per-interface flag to 0. Now, the
user instead needs to set both flags to 0 to actually disable DAD.

Restore the previous behaviour by setting the default for the global
'accept_dad' flag to 0. This way, DAD is still enabled by default,
as per-interface flags are set to 1 on device creation, but setting
them to 0 is enough to disable DAD on a given interface.

- Before 35e015e1f57a7 and a2d3f3e3:
          global    per-interface    DAD enabled
[default]   1             1              yes
            X             0              no
            X             1              yes

- After 35e015e1 and a2d3f3e3:
          global    per-interface    DAD enabled
[default]   1             1              yes
            0             0              no
            0             1              yes
            1             0              yes

- After this fix:
          global    per-interface    DAD enabled
            1             1              yes
            0             0              no
[default]   0             1              yes
            1             0              yes

Fixes: 35e015e1 ("ipv6: fix net.ipv6.conf.all interface DAD handlers")
Fixes: a2d3f3e3 ("ipv6: fix net.ipv6.conf.all.accept_dad behaviour for real")
CC: Stefano Brivio <sbrivio@redhat.com>
CC: Matteo Croce <mcroce@redhat.com>
CC: Erik Kline <ek@google.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Move inclusion of a private kernel header <net/tcp.h>
from uapi/linux/tls.h to its only user - net/tls.h,
to fix the following linux/tls.h userspace compilation error:

/usr/include/linux/tls.h:41:21: fatal error: net/tcp.h: No such file or directory

As to this point uapi/linux/tls.h was totaly unusuable for userspace,
cleanup this header file further by moving other redundant includes
to net/tls.h.

Fixes: 3c4d7559 ("tls: kernel TLS support")
Cc: <stable@vger.kernel.org> # v4.13+
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

iOS devices require the host to be "trusted" before servicing network
packets. Establishing trust requires the user to confirm a dialog on the
iOS device.Until trust is established, the iOS device will silently discard
network packets from the host. Currently, the ipheth driver does not detect
whether an iOS device has established trust with the host, and immediately
sets up the transmit queues.

This causes the following problems:

- Kernel taint due to WARN() in netdev watchdog.
- Dmesg spam ("TX timeout").
- Disruption of user space networking activity (dhcpd, etc...) when new
interface comes up but cannot be used.
- Unnecessary host and device wakeups and USB traffic

Example dmesg output:

[ 1101.319778] NETDEV WATCHDOG: eth1 (ipheth): transmit queue 0 timed out
[ 1101.319817] ------------[ cut here ]------------
[ 1101.319828] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:316 dev_watchdog+0x20f/0x220
[ 1101.319831] Modules linked in: ipheth usbmon nvidia_drm(PO) nvidia_modeset(PO) nvidia(PO) iwlmvm mac80211 iwlwifi btusb btrtl btbcm btintel qmi_wwan bluetooth cfg80211 ecdh_generic thinkpad_acpi rfkill [last unloaded: ipheth]
[ 1101.319861] CPU: 0 PID: 0 Comm: swapper/0 Tainted: P           O    4.13.12.1 #1
[ 1101.319864] Hardware name: LENOVO 20ENCTO1WW/20ENCTO1WW, BIOS N1EET62W (1.35 ) 11/10/2016
[ 1101.319867] task: ffffffff81e11500 task.stack: ffffffff81e00000
[ 1101.319873] RIP: 0010:dev_watchdog+0x20f/0x220
[ 1101.319876] RSP: 0018:ffff8810a3c03e98 EFLAGS: 00010292
[ 1101.319880] RAX: 000000000000003a RBX: 0000000000000000 RCX: 0000000000000000
[ 1101.319883] RDX: ffff8810a3c15c48 RSI: ffffffff81ccbfc2 RDI: 00000000ffffffff
[ 1101.319886] RBP: ffff880c04ebc41c R08: 0000000000000000 R09: 0000000000000379
[ 1101.319889] R10: 00000100696589d0 R11: 0000000000000378 R12: ffff880c04ebc000
[ 1101.319892] R13: 0000000000000000 R14: 0000000000000001 R15: ffff880c2865fc80
[ 1101.319896] FS:  0000000000000000(0000) GS:ffff8810a3c00000(0000) knlGS:0000000000000000
[ 1101.319899] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1101.319902] CR2: 00007f3ff24ac000 CR3: 0000000001e0a000 CR4: 00000000003406f0
[ 1101.319905] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1101.319908] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1101.319910] Call Trace:
[ 1101.319914]  <IRQ>
[ 1101.319921]  ? dev_graft_qdisc+0x70/0x70
[ 1101.319928]  ? dev_graft_qdisc+0x70/0x70
[ 1101.319934]  ? call_timer_fn+0x2e/0x170
[ 1101.319939]  ? dev_graft_qdisc+0x70/0x70
[ 1101.319944]  ? run_timer_softirq+0x1ea/0x440
[ 1101.319951]  ? timerqueue_add+0x54/0x80
[ 1101.319956]  ? enqueue_hrtimer+0x38/0xa0
[ 1101.319963]  ? __do_softirq+0xed/0x2e7
[ 1101.319970]  ? irq_exit+0xb4/0xc0
[ 1101.319976]  ? smp_apic_timer_interrupt+0x39/0x50
[ 1101.319981]  ? apic_timer_interrupt+0x8c/0xa0
[ 1101.319983]  </IRQ>
[ 1101.319992]  ? cpuidle_enter_state+0xfa/0x2a0
[ 1101.319999]  ? do_idle+0x1a3/0x1f0
[ 1101.320004]  ? cpu_startup_entry+0x5f/0x70
[ 1101.320011]  ? start_kernel+0x444/0x44c
[ 1101.320017]  ? early_idt_handler_array+0x120/0x120
[ 1101.320023]  ? x86_64_start_kernel+0x145/0x154
[ 1101.320028]  ? secondary_startup_64+0x9f/0x9f
[ 1101.320033] Code: 20 04 00 00 eb 9f 4c 89 e7 c6 05 59 44 71 00 01 e8 a7 df fd ff 89 d9 4c 89 e6 48 c7 c7 70 b7 cd 81 48 89 c2 31 c0 e8 97 64 90 ff <0f> ff eb bf 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
[ 1101.320103] ---[ end trace 0cc4d251e2b57080 ]---
[ 1101.320110] ipheth 1-5:4.2: ipheth_tx_timeout: TX timeout

The last message "TX timeout" is repeated every 5 seconds until trust is
established or the device is disconnected, filling up dmesg.

The proposed patch eliminates the problem by, upon connection, keeping the
TX queue and carrier disabled until a packet is first received from the iOS
device. This is reflected by the confirmed_pairing variable in the device
structure. Only after at least one packet has been received from the iOS
device, the transmit queue and carrier are brought up during the periodic
device poll in ipheth_carrier_set. Because the iOS device will always send
a packet immediately upon trust being established, this should not delay
the interface becoming useable. To prevent failed UBRs in
ipheth_rcvbulk_callback from perpetually re-enabling the queue if it was
disabled, a new check is added so only successful transfers re-enable the
queue, whereas failed transfers only trigger an immediate poll.

This has the added benefit of removing the periodic control requests to the
iOS device until trust has been established and thus should reduce wakeup
events on both the host and the iOS device.
Signed-off-by: Alexander Kappner <agk@godking.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

We always poll tx for socket, this is sub optimal since this will
slightly increase the waitqueue traversing time and more important,
vhost could not benefit from commit 9e641bdc ("net-tun:
restructure tun_do_read for better sleep/wakeup efficiency") even if
we've stopped rx polling during handle_rx(), tx poll were still left
in the waitqueue.

Pktgen from a remote host to VM over mlx4 on two 2.00GHz Xeon E5-2650
shows 11.7% improvements on rx PPS. (from 1.28Mpps to 1.44Mpps)

Cc: Wei Xu <wexu@redhat.com>
Cc: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>